Service isolate rework take 2

runtime/vm/class_table.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/class_table.h"
 #include "vm/flags.h"
 #include "vm/freelist.h"
 #include "vm/growable_array.h"
 #include "vm/heap.h"
 #include "vm/object.h"
@@ skipping 177 matching lines @@
     }
   }
 }
 
 
 void ClassTable::Print() {
   Class& cls = Class::Handle();
   String& name = String::Handle();
 
   for (intptr_t i = 1; i < top_; i++) {
+    if (!HasValidClassAt(i)) {
+      continue;
+    }
+    if (i == kFreeListElement) {
+      continue;
+    }
     cls = At(i);
     if (cls.raw() != reinterpret_cast<RawClass*>(0)) {
       name = cls.Name();
       OS::Print("%" Pd ": %s\n", i, name.ToCString());
     }
   }
 }
 
 
 void ClassTable::PrintToJSONObject(JSONObject* object) {
@@ skipping 264 matching lines @@
 
 void ClassTable::UpdateLiveNew(intptr_t cid, intptr_t size) {
   ClassHeapStats* stats = PreliminaryStatsAt(cid);
   ASSERT(stats != NULL);
   ASSERT(size >= 0);
   stats->post_gc.AddNew(size);
 }
 
 
 }  // namespace dart